氧化铁附加物对自硬呋喃树脂砂发气量与发气速率的影响  

Effect of Iron Oxide Addition on Gas Evolution Volume and Gas Evolution Rate of No-Bake Furan Resin-Bonded Sand

作　　者：万鹏[1] 吴海军 殷亚军[1] 计效园[1] 李远才[1] 周建新[1] WAN Peng;WU Hai-jun;YIN Ya-jun;JI Xiao-yuan;LI Yuan-cai;ZHOU Jian-xin(State Key Laboratory of Materials Processing and Die&Mould Technology,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China)

机构地区：[1]华中科技大学材料成形与模具技术国家重点试验室,湖北武汉430074

出　　处：《铸造》2021年第8期952-957,共6页Foundry

基　　金：国家重点研发计划重点专项(2020YFB1710100);国家自然科学基金面上项目(51905188)。

摘　　要：自硬树脂砂与其他粘结剂砂相比,具有常温和高温强度高、铸件尺寸精度高、旧砂再生回用率高等优点,然而其发气量和发气速率过大往往会导致铸件气孔类缺陷。氧化铁附加物是一种较常见的改善铸件气孔类缺陷的添加物。本研究采用发气性测量仪研究不同温度下氧化铁附加物添加量对自硬呋喃树脂砂发气量和发气速率的影响。若单考虑发气量和发气速率,有色合金铸件浇注温度下在树脂砂中加入1%~4%的氧化铁附加物确实能减少铸件气孔类缺陷发生的概率,铸钢件或者铸铁件浇注温度下,则需要将氧化铁的添加量控制在2%以下才能减少铸件气孔类缺陷发生的概率。Compared with other kinds of binder sand,no-bake furan resin-bonded sand has the advantages of highstrength at room temperature and high temperature,high precision of casting size and high regeneration rateof used sand.However,too much gas evolution volume and gas evolution rate lead to porosity defects incastings.Iron oxide additive is a common additive to improve the porosity of castings.The gas measuringinstrument was used to research gas evolution volume and gas evolution rate of no-bake furan resin-bondedsand under different temperatures and different iron oxide addition amounts.Just in the case of the gasevolution volume and gas evolution rate,the addition of 1% to 4% iron oxide can really reduce the incidenceof the blowhole defect at the pouring temperature of nonferrous alloys,and the addition of less than 2% iron oxide can also reduce the probability of the occurrence of porosity defects at the steel or iron castingtemperature.

关 键 词：自硬呋喃树脂砂 氧化铁 发气量 发气速率 

分 类 号：TG221[金属学及工艺—铸造]